The specs on the BC-CSG BATTERY CHARGER for the SONY DSC-W120 are:
Rated Input: 100-240V, 50/60Hz, 4-7 VA, 2W
Rated Output: 4.2V, 0.25A
Using the charger in Europe, UK should only need a traveler adapter (not transformer) to plug it into the wall outlet.

If you are wanting to improve the quality of the video you have recorded you will need to transfer the footage to your computer and enhance it with an editing program. There is devices such as the Dazzle from Pinnacle that connect directly to your computer to capture footage if neither your Computer or Camcorder have a Firewire (IEEE 1394) connection. You can also connect your camcorder to a stand alone DvD burner by the A/V (Audio Video ) Cables, but this will give just a straight copy of the footage with no improvements.

There a many D-SLR cameras that have Live View. Canon has the Rebel XT up to the 50D. Sony has the a300 and a350. Nikon has the D90. Olympus E-420 and up. All of these manufacturers have much more models with Live View than just the ones I have listed here.

As has been said...SLR stands for Single Lens Reflex. The single lens part being that there is only ONE lens attached to the body of the camera. Some other types of cameras such as “Range Finders” and “Medium Formats” have 2 lenses. One that would go to the film and one that would go to the view finder. The problem with that is the photograph would not be exactly what was seen through the eyepiece, it would be slightly off. This is where the “Reflex” part comes in. By using a Mirror or a Prism, the image seen through the lens is bounced up to the eyepiece for viewing, then when the shutter button is pressed the mirror flips out of the way and allows the image to expose the film. This way the photo is exactly what the photographer sees without a slight offset. This was known as “See Through Lens” photography.